Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6e7ab91a930824…

MALICIOUS

PDF

76.9 KB Created: 2021-03-27 11:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a10ade3d0d4ee7edf4c512867a782ff SHA-1: 7dffbf70dce252267af4856e835382c0458d37a4 SHA-256: fb6e7ab91a930824f98164da45708e4d8ebe7b6e0b966907108cefd8fe2ce743
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic 'SE_LOLBIN_RUN_COMMAND' and the presence of multiple suspicious URLs like 'https://gimoguvi.ru/strik' and 'http://dekovag.mypressonline.com/41420004999.pdf' indicate an attempt to redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic further suggests a phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/strik?utm_term=what+are+the+fox+channels+on+dish+network
    • http://dekovag.mypressonline.com/41420004999.pdf
    • http://my-credit.info/gimasevumigu82jm.pdf
    • http://piwofoterif.sportsontheweb.net/world_map_time_zones_printable.pdf
    • http://dvestideyli.xyz/how_to_multiply_exponents_with_different_variables1wvn8.pdf
    • http://bezugunafagomup.22web.org/56192355570.pdf
    • http://stavki-na-sport.site/219588056847iau6.pdf
    • http://p-kavkaza.ru/207116457619wcmd.pdf
    • http://bezerojiw.scienceontheweb.net/32705148493.pdf
    • http://pofaduxiruk.getenjoyment.net/78332582251.pdf
    • http://paypallsecurity.com/woxotutusawokumedojudwygn.pdf
    • http://raisinshub.pro/jubuwimarozkiurv.pdf
    • http://awpmode.com/88067827639mia41.pdf
    • http://koponegigat.medianewsonline.com/what_are_the_highest_paying_jobs_in_information_technology.pdf
    • http://gisujug.mypressonline.com/pet_bottle_manufacturing_process.pdf
    • http://coolvdomaion.online/how_to_sit_thich_nhat_hanhwt787.pdf
    • http://tonedomopoja.scienceontheweb.net/68394615163.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vorisenunajix.myartsonline.com/40452120018.pdf
    • https://s3.amazonaws.com/sewamos/nuzoromixatubuwun.pdf
    • https://s3.amazonaws.com/faduxodiwo/jaxatafixazomo.pdf
    • http://xevikosurozogin.rf.gd/35793561556.pdf
    • http://favifodov.rf.gd/birozujasomikimuxe.pdf
    • http://faxiruvud.myartsonline.com/wigimadebamowekewapet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec17.bin
0367fb6a3196fe06a7fb70a98547ed097747d50883141462ac050aea7312350d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 5344 bytes
font_01_sfnt_off0000fe5c.bin
c8ef7bc70049aa1aec03fcd4f6256f75417e7aaf12000d857d8ca90ac66cc133		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5C 11736 bytes

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